Improvement in railroad-chairs



UNITED STATES PATENT OFFICE.

sYLvEsTEE EEIsAox, 0E WALTON, NEwYoRx.

IMPROVEMENT IN RAILROAD-CHAIRS.

Specification forming part of Letters Patent No. 38,944, dated June 23, 1863 5 antedated October 21, 1862.

constructed as to be put on and fastened without displacing the rails, and fastening the rails in the chair by means of a compound wedge, which, together with the chair, is so con structed as securely to fasten the rails in the chair, and also act as a bracket to support the head of the rail and prevent its springing or turning, and also so constructed that the pressure of the wedge acts as a springer-clamp on the rail, so as to hold the wedge when contracted by cold and allow the rail to yield it' the parts become unequally expanded by heat,

and so constructed as to secure any pressure on the rail to press directly on the center of the web and foot of the rail and also on the center of the chair.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

I construct my railroad-chairof any materials and dimensions adapted to the size of the rails, and of sutlicient strength and of any known outside form, and apply thereto, when used on the ties, bolts, spikes, or other fastenings, to secure them to the ties; but, for the purpose of placing the chair on the rails without displacing them, (see Fig 1,) I make an opening or slot in the top of my chair through its whole length equal in width to oie-halt the width of the foot of the rail on which it is to be used, added to the width of the web of the rail, and of sufficient depth and width at the bottom to receive the foot of the rail, and the rest for the foot of the rail I make crowning through the entire length of the chair (see Fig. l) at bottom of slot described, D. On the side ofthe chair intended for the outside of the track, (see B, Fig. 1,) at

the side of the above-described slot, and above and on a line with the foot of the rail, I make a slot through the entire length ot' the chair and of depth equal to the t'oot ofthe rail measured from the web to the edge.

I construct my wedge, Fig. 2, of an equal or greater length than the chair, and of such dimensions and shape or form as to till the slot in the chair under the jaw B, Fig. 1, and also between the jaw B and the web and head of the raIl and having six friction-sides.

To put my chair on the rail, place the chair under the rail, the side ot' the chair marked B (see Fig. l) outside the track. Raise the side of the chair B so as to insert the foot of the rail into the slot. Raise the opposite side of the chair, while pressing on the chair, so as to send the foot of the rail inserted into the slot under the jaw B until the opposite side of the foot of the rail passes the jaw F, when draw back the chair and the foot of the rail U will pass into its rest D. Insert the Wedge and drive it until the rail is firmly fastened in the chair. A I

What I claim as my invention, and desre to secure by Letters Patent, is

The construction of a railroad-chair in such a manner that it may be used for coupling the rails or fastening them on the ties, and may be placed on the rails Without displacing them, and also the entire inner construction, as

shown in the drawings and description, and

also the entire form of the wedge, as so shown, which together are so constructed as to sc- Acurely fasten the rails in the chair and also act as a bracket to support the head ofthe rail and prevent its springing or turning, and so constructed also that the pressure of the wedge acts as a clamp or spring on the rail, so as to hold the rail and wedge firmly when contracted by cold and allow the parts to give when expanded by heat, so as to avoid breaking, and also so as to receive all pressure on the rail to act directly on the center of the web and foot of the rail and on the center 'of the chair. v

kSYLVES'IEB BRISACK. In presence o GABRIEL S. NORTH, NATHANIEL G. EELLS. 

